From: Danny Ayers (danny.ayers@gmail.com)
Date: Tue May 10 2005 - 12:25:17 PDT
Sweet!
On 5/10/05, Damian Steer <damian.steer@hp.com> wrote:
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> Hi all,
>
> Libby's been talking about the problem of working out what to ask a
> sparql source. That is, given a sparql source how can I work out
> whether it's worth asking it about people, images etc.
>
> Here's a suggestion. Feel free to attack it :-) I've put up a simple
> demo in javascript (uh-oh) at:
>
> <http://rdfweb.org:8080/jenadev/sparqlinto.html>
>
> It seems to work in mozilla and safari.
>
> What it does:
>
> 1) Given a sparql source (don't change that, btw, because of
> javascript security restrictions) ask 'What kinds of thing do you
> know about?'.
>
> 2) For each kind of thing it knows about put up a button.
>
> 3) Clicking the button will generate a sparql query that should be
> tailored to that kind of thing.
>
> 4) You can execute that query and see the results (thanks to Libby's
> code).
>
> What it's doing is asking the store about itself, and specifically
> the classes it knows about. These classes are described in owl, which
> you can see at:
>
> <http://rdfweb.org:8080/jenadev/desc.rdf>
>
> These are 'store local', e.g. my people are a subclass of foaf
> people. Ideally this information would mined from the store.
>
> (Hmm, I should add some allValuesFrom for 'from' 'to', to indicate
> the range is people).
>
> Anyway, it's pretty easy to construct prototype queries from the
> class descriptions.
>
> Hopefully this approach is a bit better than listing properties used
> in a store, since it has a little more structure.
>
> Damian
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-- http://dannyayers.com
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